Apex domains cannot have CNAME records.
Question and response
Question
dig kotte-design.com. NS
Answer
kotte-design.com. 5 NS ns-47.awsdns-05.com.
kotte-design.com. 5 NS ns-1370.awsdns-43.org.
kotte-design.com. 5 NS ns-589.awsdns-09.net.
kotte-design.com. 5 NS ns-1753.awsdns-27.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0